
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkXfermode.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkParsePath.h"
#include "SkTime.h"
#include "SkTypeface.h"

#include "SkGeometry.h"

class ConcavePathView : public SampleView
    {
    public:
        ConcavePathView() {}

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "ConcavePaths");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            SkPaint paint;

            paint.setAntiAlias(true);
            paint.setStyle(SkPaint::kFill_Style);

            // Concave test
            if (1)
                {
                SkPath path;
                canvas->translate(0, 0);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(30), SkIntToScalar(30));
                path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
                canvas->drawPath(path, paint);
                }
            // Reverse concave test
            if (1)
                {
                SkPath path;
                canvas->save();
                canvas->translate(100, 0);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
                path.lineTo(SkIntToScalar(30), SkIntToScalar(30));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                canvas->drawPath(path, paint);
                canvas->restore();
                }
            // Bowtie (intersection)
            if (1)
                {
                SkPath path;
                canvas->save();
                canvas->translate(200, 0);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
                canvas->drawPath(path, paint);
                canvas->restore();
                }
            // "fake" bowtie (concave, but no intersection)
            if (1)
                {
                SkPath path;
                canvas->save();
                canvas->translate(300, 0);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(50), SkIntToScalar(40));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
                path.lineTo(SkIntToScalar(50), SkIntToScalar(60));
                path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
                canvas->drawPath(path, paint);
                canvas->restore();
                }
            // Fish test (intersection/concave)
            if (1)
                {
                SkPath path;
                canvas->save();
                canvas->translate(0, 100);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
                path.lineTo(SkIntToScalar(70), SkIntToScalar(50));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
                path.lineTo(SkIntToScalar(0), SkIntToScalar(50));
                canvas->drawPath(path, paint);
                canvas->restore();
                }
            // Collinear test
            if (1)
                {
                SkPath path;
                canvas->save();
                canvas->translate(100, 100);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(50), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(50), SkIntToScalar(80));
                canvas->drawPath(path, paint);
                canvas->restore();
                }
            // Hole test
            if (1)
                {
                SkPath path;
                canvas->save();
                canvas->translate(200, 100);
                path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
                path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
                path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
                path.moveTo(SkIntToScalar(30), SkIntToScalar(30));
                path.lineTo(SkIntToScalar(30), SkIntToScalar(70));
                path.lineTo(SkIntToScalar(70), SkIntToScalar(70));
                path.lineTo(SkIntToScalar(70), SkIntToScalar(30));
                canvas->drawPath(path, paint);
                canvas->restore();
                }
            }

        virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
            {
            this->inval(NULL);
            return this->INHERITED::onFindClickHandler(x, y);
            }

    private:
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new ConcavePathView;
    }
static SkViewRegister reg(MyFactory);

